Machine or apparatus for cutting plastic toffee or like material



Jan. 23, 1934. G ROSE 1,944,577

MACHINE OR APPARATUS FOR CUTTING PLASTIC TOFFEE OR LIKE MATERIAL Filed July 23, 1931 2 Sheets-Sheet l \\\\\\\\\mrw A. G. ROSE Jan; 23, 1934.

MACHINE OR APPARATUS FOR CUTTING PLAS-TIC TOFFEE OR LIKE MATERIAL 7 Filed July 23, 1931 2 Sheets-Sheet 2 v %M W.

Jaw-41 p Patented Jan. 23, 1934 I MACHINE on APPARATUS FOR CUTTING u PLASTIC TOFFEE on LIKE MATERIAL Alfred German Rose, Lincoln, England, assignor to Rose Brothers (Gainsborough) Limited, Gainsborough, England, a British Company Application July 23, 1931, Serial No. 552,788,and in Great Britain July 30, 1930 2 Claims. (Cl. 107-22) This invention is for improvements in or relaton a knife-carrier 15 at the end of a shaft 16 ing to machines or apparatus for cutting plastic which shaft is supported in a bearing 17 and toffee or like material. driven through bevel gearing 18, 19; The disc In machines for-cutting plastic material (such knife 14 is formed with a hole at its geometrical I as toffee) the trouble arises that particles of the centre and also with eight holes, numbered 20, '60 material adhere to and accumulate on the cutting equally spaced on a pitch-circle struck from this knife and clog it. For this reason it has hitherto centre. The disc knife is bolted to the carrier been necessary to suspend the operation of the 15 by a set-screw 21 which extends through a machine periodically in order that an attendant central hole in the disc into the carrier, and it may clean the knife. The present invention has will be observed that this set-screw is offset from @5 for its chief object to obviate this disability and the centre of the carrier by an amount equal to to this end provides in apparatus for severing the radius of the pitch-circle of the holes 20. At plastic material the combination with a knife, of the centre of the carrier is a second set-screw 22 7 means for directing a spray or jet of a treating which extends through one of the holes 20 into material on to the knife edge in order to prevent the carrier. Thus by slacking oif the set-screw 56 particles of the material clinging to it. I am 21 and removing the set-screw 22 the disc may aware that it is known in machine tools to direct be turned around on the carrier to change the a supply of lubricant on to the cutting tool, for portion of its cutting edge which passes through example on to a milling cutter, and it is also the bar of stock 10. As one portion of the cutting known for example in cutting stone or glass to edge becomes dulled the knife is adjusted to bring direct a spray containing an abrasive on to a the next portion into operation until the complete blunt cutting tool. No claim is made to such cutting edge has been used. The knife severs a constructions, the present invention being solely piece from the stock once in each revolution and concerned with apparatus for severing plastic its action is intermittent in the sense that cutting material such as tofiee by means of a knife and i effected y ing a brief Period in each go with overcoming the disability pointed out above. olution.

This invention also includes in apparatus for Beneath the above apparatus is a vaporizer severing plastic material the combination with somewhat similar to that commonly employed a knife, of a vaporizer arranged to direct a spray for spraying perfumes, disinfectants and powor jet on to the edge of the knife. The apparaders. This vaporizer consists of a container 23 5'5 tus may comprise a container for a treating mafor a treating material of the kind previously terial, a nozzle adjacent to the knife edge, a conmentioned, provided with a central vertical conduit communicating between the nozzle and the duit 24 which terminates in a nozzle 25 adjainterior of the container near the base of the cent to the knife edge. The end of this conduit latter, and a pressure fluid injector in or opening 24 terminates inside the container 23 near the g5 into the conduit for forcing the treating material base of the latter and just above the container through the nozzle. the conduit is bulged out as at 26. Inside the The treating material may consist of a powder bulge 26 is a nozzle 27 of a pressure pipe 28 which such as talcum powder, stearite, chalk or ground leads from a valve chamber 29 and from a resrice or of a liquid such as water, glycerine or oil. ervoir 30. The reservoir 30 communicates by 55 One construction according to the present ina pipe 31 with an air compressor 32. The nozvention will now be described in detail by way zle 27 is provided as shown with a somewhat reof x mpl w reference to the mp nyin stricted orifice and constitutes an injector. Indiagrammatic drawings, in which, side the valve chamber 29 is a mushroom valve Figure 1 is a side elevation partly in section, 33 which is drawn on to its seating 34 by a com- 1' Figure 2 is an end elevation of a portion of the pression spring 35 but is periodically raised by apparatus shown in Figure 1, looking in the direcmeans of a lever 36 which is rocked by a cam tion of the arrow 2. 37. The cam 3'7 is driven by means of a chain Throughout this description like reference nu- 38 (indicated by a chain dotted line) from a merals indicate like parts. sprocket which rotates with the bevel gear 18.

A bar of plastic material 10 is fed along a feed Thus a spray or jet of the treating material is tube 11 between two feed rollers 12 and 13 todirected on to the knife 14 once in each revoluwards aknife 14. The knife 14 is in the form of tion of the latter so that the cutting edge is a disc with a cutting edge formed completely coated with the material before it passes through around its periphery. This disc knife is mounted the bar of stock 10 and particles of the stock do not cling to it. The air compressor 32 is driven by a connecting rod 39 mounted at the end of a crank 40 which is attached to a shaft 41 on which the cam 37 is mounted.

I claim:-

1. In apparatus for cutting plastic material from a bar of stock, the combination with a rotatable knife carrier and a disc-shaped knife having a peripheral cutting edge eccentrically mounted on the carrier to out intermittently, of a container for treating material, a nozzle located below the knife directed upwardly, a conduit extending between the nozzle and the container at the base of the latter, an air conduit, an air compressor, a second conduit extending from the air compressor to the air nozzle, a valve in the second conduit and means for operating the valve in synchronism with the intermittent cutting motion of the knife.

2. In apparatus for severing plastic material, the combination with a cutting mechanism including a rotatable knife carrier and a discshaped knife having a peripheral cutting edge andeccentrically mounted on the carrier, of an atomizer for applying a well distributed mist of lubricant over the knife, said atomizer having a nozzle directed towards the knife, a fluid reservoir, an air injector and a valve interposed between said fluid reservoir and air injector, said valve being operated in a predetermined relationship to the cutting mechanism.

ALFRED GERMAN ROSE. 

